Congenital Dermoid Fistula of the Anterior Chest Region

Abstract

neck to the anterior chest, with an area of high density at the subcutis. The lesion ended as a nodule of 25 mm in diameter with an attenuation similar to that of muscle (Fig. 1c), of which the capsule showed high density. The internal contents were almost homogeneous. The nodular lesion ruptured due to infection before the operation, with formation of an abscess in the anterior chest (Fig. 1a). Excision was performed under general anaesthesia. The abscess, funicular lesion, and skin orifice were totally excised. The fistula terminated on the fascia of the pectoralis major muscle. Histopathological analysis showed that the fistula was lined by keratinizing strati fied squamous epithelium, with numerous hair follicles and sebaceous glands. The lumen was dilated in several areas by its keratin contents. Eccrine glands were also seen (Fig. 1d). Infiltration of neutrophils and foreign body giant cells was observed in the surrounsding area. Thus, the diagnosis of CDF of the anterior chest region was made. The postoperative course was uneventful, although the scar was slightly hypertrophic. No clinical recurrence was evident at an 11-month follow-up.